Alkalinity

[Aquattro]

Ya, it sounds plausible. I'd maybe retest with a different kit, but depending on salt and source water, it could be that low.

[coolhandgoose]

Are you sure the measurement is in dkh or in meq/l (I think that's what the other one is called)

[Aquattro]

Originally Posted by coolhandgoose

Are you sure the measurement is in dkh or in meq/l (I think that's what the other one is called)

good point. I think that value is fine for dKh...too many units for alk

[coolhandgoose]

Other way around, that's really low for dkh.
If its meq/l I think it's fine.

[Seriak]

It was 62 then 66 ppm.

[Delphinus]

Yeah that's really low. What salt are you using?

[Seriak]

I initially used a half bucket of 8 year old IO and the rest has been new reef crystals.